If a discrete input module is Active High, what value needs to be seen at the terminal to illuminate the status indicator?

To illuminate the status indicator on a discrete input module that is configured as Active High, a certain voltage level must be present at the terminal. In an Active High configuration, the terminal requires a higher voltage to activate the attached device or indicator.

In this case, the value that needs to be seen at the terminal is typically one of the common voltage levels used in control systems. Given the choice of 5V DC, 12V DC, and 24V DC, the correct answer indicates a specification that the input module is designed to work with. When the module is Active High, it expects a defined amount of voltage to be applied to turn on the indicator.

The value of 12V DC is a common operational level for many industrial control systems, and it's perfectly suited to illuminate status indicators effectively. This voltage is high enough to signify a clear "on" state without exceeding typical input ratings that might cause issues in the module. Essentially, when 12V DC is applied, it causes the internal circuitry of the module to recognize this as a signal for activation, hence turning on the status indicator.

In contrast, the other voltage levels provided are either too low or not within the operational range specified for this particular input configuration, making them